The ads will run in San Francisco, Oakland and San Jose on Thursday and Friday. They will also run in Southern California on Friday and Monday, the night before the election.

“Comedy Central’s flagship shows are the perfect outlet for Prop. 19’s reform message,” said Stephen Gutwillig, Drug Policy Action’s California director. “Getting younger voters and progressive voters to the polls Tuesday could well make the difference for this historic initiative to end decades of failed, punitive and wasteful marijuana policies.”

Yes on 19 supporters also intend to bring the “Legalize Pot” message to Stewart and Colbert viewers when several hundred people gather at the “Rally to Restore Sanity” march Saturday in Washington, D.C. “Supporters will march in business suits – not Birkenstocks – to reinforce the message that there is no archetypal marijuana legalization supporter,” Drug Policy Action Executive Director Ethan Nadelmann said.

Meanwhile, the No on 19 campaign began airing a radio ad today in the Bay Area noting that the major-party candidates for U.S. Senate, governor and attorney general, as well as U.S. Sen. Dianne Feinstein and President Barack Obama, all oppose the measure. It’ll remain on the air through Election Day.